Not only will this wood-block pistol make you the terror of your next family activity night, it'll actually improve your Jenga game! Through science! For, you see, the faster you can knock a block out of a Jenga tower, the shorter the amount of time over which it can exert a frictional force on its neighbors. Which means the whole kit-and-caboodle is much less likely to come tumbling down.

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Want one? You'll have to build it yourself. Which is fitting because the word "jenga" actually means something like "Hey, you, build it!" in Swahili.